Highly Active and Stable Pt-USY in the Low-Temperature de-NOx HC-SCR |
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| Authors: | Javier Pérez-Ramírez Guido Mul Freek Kapteijn and Jacob A Moulijn |
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| Institution: | (1) Industrial Catalysis, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands;(2) Industrial Catalysis, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands |
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| Abstract: | Selective catalytic reduction of NOx by propene has been investigated on Pt-USY and compared to other Pt-catalysts. The catalyst was characterized by XRD, Ar adsorption at 87 K, TEM, and CO chemisorption, and tested in a gas mixture system in excess oxygen. Pt-USY shows an excellent activity in the reaction, with a molar NOx conversion of 90% at 475 K. Stability during time-on-stream and resistance to SO2 and H2O in the feed stream has also been investigated. Pt-USY performs better under lean-burn conditions than other Pt-catalysts on ZSM-5, Al2O3, or SiO2. The selectivity to N2 was similar for all the catalysts ( 30%), the other major product being N2O. |
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| Keywords: | Pt-USY de-NOx HC-SCR propene stability |
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